In the early eighteenth century, while still a twenty-something, George Berkeley, Bishop of Cloyne, proposed the idea that the true object of human cognition is not things but perceptions. "To be is to be perceived ...(or to perceive)" was his famous formulation. The part in parentheses is to allow for the existence of minds.
The images in this series have no existence at all other than in perception. This isn't just because they're photographs. They are abstractions built on images of the interior walls of dumpsters--except for the final two, which are lichen on a rock and a billboard in Prague.
The next three are exterior dumpster walls.
They are followed by fungus on a lakeside rock in Pennsylvania and a graffitied billboard in Prague.